<template>
  <div class="star" :class="starType">
  	<span v-for="itemClass in itemClasses" :class="itemClass" class="star-item"></span>
  </div>  
</template>

<script>
	const LENGTH = 5;
	const CLS_NO = 'on';
	const CLS_HALF = 'half';
	const CLS_OFF = 'off';
	export default {
		props: {
			size: {
				type: Number
			},
			score: {
				type: Number
			}
		},

		computed: {
			starType() {
				return 'star-' + this.size;
			},
			itemClasses() {
				let result = [];
				let score = Math.floor(this.score * 2) / 2;
				let hasDecimal = score % 1 !== 0;
				let integer = Math.floor(this.score);
				for (let i = 0; i < integer; i++) {
					result.push(CLS_NO);
				}
				if (hasDecimal) {
					result.push(CLS_HALF);
				}
				while (result.length < LENGTH) {
					result.push(CLS_OFF);
				}
				return result
			}
		}
	}

</script>

<style lang="scss" type="text/css">
	@import "../../common/sass/mixin";
	.star {
		font-size: 0;
		.star-item {
			display: inline-block;
			background-repeat: no-repeat;
		}
		&.star-48 {
			.star-item {
				width: 20px;
				height: 20px;
				margin-right: 22px;
				background-size: 20px 20px;
				&:last-child {
					margin-right: 0;
				}
				&.on {
					@include bg-image('star48_on');
				}
				&.half {
					@include bg-image('star48_half');
				}
				&.off {
					@include bg-image('star48_off');
				}
			}
		}
		&.star-36 {
			.star-item {
				width: 15px;
				height: 15px;
				margin-right: 6px;
				background-size: 15px 15px;
				&:last-child {
					margin-right: 0;
				}
				&.on {
					@include bg-image('star36_on');
				}
				&.half {
					@include bg-image('star36_half');
				}
				&.off {
					@include bg-image('star36_off');
				}
			}
		}
		&.star-24 {
			.star-item {
				width: 10px;
				height: 10px;
				margin-right: 3px;
				background-size: 10px 10px;
				&:last-child {
					margin-right: 0;
				}
				&.on {
					@include bg-image('star24_on');
				}
				&.half {
					@include bg-image('star24_half');
				}
				&.off {
					@include bg-image('star24_off');
				}
			}
		}
	}

</style>
